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Two point charges -q and +q are located ...

Two point charges `-q and +q` are located at points `(0,0,-a) and (0,0,a)` respectively. The potential at a point `(0,0,z)`, where `z gt a` is

A

`(qalpha)/(4piin_(0)z^(2))`

B

`(q)/(4piin_(0)alpha)`

C

`(2qalpha)/(4piin_(0)(z^(2)-alpha^(2)))`

D

`(2qalpha)/(4piin_(0)(z^(2)+alpha^(2)))`

Text Solution

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The correct Answer is:
C
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